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Worldwide distributor of NSN parts and consumables located in the USA.

Safety Relief Valve

Model / MPN: 440173 | NSN: 4820-01-020-4709
ITAR Registered seal

A valve designed to automatically release excessive pressures. It is actuated by static pressure upstream of the valve and is used as a safety valve or relief valve, and may be set to close at a predetermined pressure. It is not designed for regulation of continuously fluctuating loads. It may be inline or cartridge (manifold) design. Excludes valve (1), relief, pressure and temperature.

Product Details
NATO Stock Number
4820-01-020-4709
Sold in multiples of
1 EA
DEMIL
NO
Pipe Size Accommodated
0.750 inches 1st end
Pipe Size Accommodated
0.750 inches 2nd end
Thread Direction
Right-hand 2nd end
Thread Direction
Right-hand 1st end
Flow Control Device
Poppet
Bonnet Type
Inside spring
Bonnet Attachment Method
Integral
Disk Loading Method
Spring
Connection Style
G46b plain (pipe) 2nd end
Connection Style
G9 plain, optional en (pipe) 1st end
Valve Operation Method
Automatic or manual
Connection Type
Threaded external pipe 2nd end
Connection Type
Threaded internal pipe 1st end
Thread Size
0.750 inches 1st end
Thread Size
0.750 inches 2nd end
Opening Pressure Setting
55.0 pounds per square inch
Material
Copper alloy flow control device or plastic polytetrafluoroethylene flow control device
Material
Copper alloy seat
Material
Copper alloy stem
Material
Copper alloy body
Surface Treatment
Chromium
Thread Series Designator
Npt 2nd end
Thread Series Designator
Npt 1st end
44017 Series Parts
Solicitations
Solicitation Description Qty UOM Close Date
SPE7MC18T0467 Valve, Safety Relief 246 EA 10/20/2017
SPE7MC19T3052 Valve, Safety Relief 154 EA 12/17/2018
SPE7MC19T7339 Valve, Safety Relief 239 EA 04/01/2019
SPE7MC20T0550 Valve, Safety Relief 209 EA 10/21/2019
SPE7M320U0279 Valve, Safety Relief 510 EA 03/23/2020
SPE7MC20T6268 Valve, Safety Relief 258 EA 03/23/2020

Pricing and Availability

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440173 Cross Reference
  • SERIES125
  • 10-322-P55
  • 125-3/4-55-STEAM
  • 10-301-50
  • 10-301CHROME55PSI